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About

Lianjun Sun is a mechanical engineering researcher whose work sits at the intersection of robotics, ultrasonic machining, and dynamic stability analysis. With a focused research program dedicated to advancing robotic manufacturing capabilities, Sun has made significant contributions to understanding and mitigating chatter instability — one of the most persistent challenges limiting the adoption of industrial robots as alternatives to traditional machine tools. Sun's most influential work investigates chatter stability across a range of robotic ultrasonic machining processes, including rotary milling, longitudinal-torsional composite milling, countersinking, and edge milling of low-rigidity components. These studies systematically address the fundamental problem that robots' inherent structural flexibility, while offering advantages in workspace and cost, makes them susceptible to vibration-induced chatter that degrades machining quality and precision. His 2019 paper on robotic rotary ultrasonic milling has accumulated 61 citations, reflecting its foundational impact in the field, with subsequent studies continuing to build scholarly momentum. By developing rigorous stability models tailored to ultrasonic-assisted robotic machining, Sun has helped chart a path toward expanding robots' viability in large-scale aerospace and industrial manufacturing applications. His research offers practical frameworks that bridge theoretical dynamics with real-world machining challenges.